luci-base: luci.tools.status: properly parse infinite odhcpd leases
luci-base: luci.tools.status: properly parse infinite odhcpd leases

The expiry time in an odhcpd lease file line may be -1 to denote an infinite
lease time, so adjust the code to properly support that.

The expiry attribute of the lease object will be set to "false" in case of an
infinite lease.

Signed-off-by: Jo-Philipp Wich <bd73d35759d75cc215150d1bbc94f1b1078bee01@mein.io>

wongsyrone/luci-1,tobiaswaldvogel/luci,cshore/luci,shangjiyu/luci-with-extra,LuttyYang/luci,wongsyrone/luci-1,shangjiyu/luci-with-extra,tobiaswaldvogel/luci,lbthomsen/openwrt-luci,nmav/luci,lbthomsen/openwrt-luci,kuoruan/lede-luci,oneru/luci,daofeng2015/luci,kuoruan/luci,oneru/luci,kuoruan/luci,wongsyrone/luci-1,artynet/luci,aa65535/luci,taiha/luci,kuoruan/lede-luci,wongsyrone/luci-1,taiha/luci,Wedmer/luci,cshore/luci,remakeelectric/luci,chris5560/openwrt-luci,taiha/luci,cshore-firmware/openwrt-luci,wongsyrone/luci-1,Wedmer/luci,openwrt/luci,artynet/luci,rogerpueyo/luci,LuttyYang/luci,aa65535/luci,artynet/luci,kuoruan/luci,daofeng2015/luci,bittorf/luci,artynet/luci,cshore-firmware/openwrt-luci,openwrt/luci,oneru/luci,981213/luci-1,cshore/luci,taiha/luci,Noltari/luci,chris5560/openwrt-luci,nmav/luci,hnyman/luci,oneru/luci,wongsyrone/luci-1,nmav/luci,bittorf/luci,oneru/luci,Wedmer/luci,bittorf/luci,Noltari/luci,hnyman/luci,cshore/luci,981213/luci-1,lbthomsen/openwrt-luci,nmav/luci,openwrt/luci,nmav/luci,openwrt/luci,lbthomsen/openwrt-luci,shangjiyu/luci-with-extra,oneru/luci,aa65535/luci,hnyman/luci,daofeng2015/luci,remakeelectric/luci,LuttyYang/luci,daofeng2015/luci,hnyman/luci,981213/luci-1,remakeelectric/luci,daofeng2015/luci,LuttyYang/luci,lbthomsen/openwrt-luci,openwrt-es/openwrt-luci,rogerpueyo/luci,tobiaswaldvogel/luci,cshore-firmware/openwrt-luci,openwrt-es/openwrt-luci,kuoruan/lede-luci,cshore-firmware/openwrt-luci,981213/luci-1,rogerpueyo/luci,Noltari/luci,chris5560/openwrt-luci,Noltari/luci,openwrt/luci,openwrt/luci,remakeelectric/luci,openwrt/luci,cshore/luci,kuoruan/luci,chris5560/openwrt-luci,chris5560/openwrt-luci,remakeelectric/luci,hnyman/luci,nmav/luci,kuoruan/lede-luci,cshore-firmware/openwrt-luci,981213/luci-1,taiha/luci,kuoruan/luci,remakeelectric/luci,hnyman/luci,openwrt-es/openwrt-luci,kuoruan/lede-luci,Noltari/luci,LuttyYang/luci,aa65535/luci,kuoruan/lede-luci,nmav/luci,oneru/luci,Noltari/luci,rogerpueyo/luci,Wedmer/luci,cshore/luci,bittorf/luci,bittorf/luci,cshore-firmware/openwrt-luci,daofeng2015/luci,tobiaswaldvogel/luci,shangjiyu/luci-with-extra,tobiaswaldvogel/luci,chris5560/openwrt-luci,Noltari/luci,cshore/luci,LuttyYang/luci,openwrt/luci,hnyman/luci,aa65535/luci,tobiaswaldvogel/luci,kuoruan/lede-luci,rogerpueyo/luci,LuttyYang/luci,chris5560/openwrt-luci,artynet/luci,openwrt-es/openwrt-luci,tobiaswaldvogel/luci,LuttyYang/luci,kuoruan/luci,kuoruan/luci,kuoruan/luci,shangjiyu/luci-with-extra,shangjiyu/luci-with-extra,taiha/luci,openwrt-es/openwrt-luci,kuoruan/lede-luci,artynet/luci,taiha/luci,openwrt-es/openwrt-luci,chris5560/openwrt-luci,artynet/luci,Wedmer/luci,lbthomsen/openwrt-luci,Noltari/luci,cshore-firmware/openwrt-luci,remakeelectric/luci,daofeng2015/luci,rogerpueyo/luci,artynet/luci,wongsyrone/luci-1,taiha/luci,tobiaswaldvogel/luci,Wedmer/luci,aa65535/luci,Wedmer/luci,981213/luci-1,bittorf/luci,bittorf/luci,openwrt-es/openwrt-luci,cshore-firmware/openwrt-luci,openwrt-es/openwrt-luci,oneru/luci,cshore/luci,Wedmer/luci,daofeng2015/luci,hnyman/luci,981213/luci-1,rogerpueyo/luci,aa65535/luci,shangjiyu/luci-with-extra,nmav/luci,wongsyrone/luci-1,shangjiyu/luci-with-extra,aa65535/luci,artynet/luci,Noltari/luci,lbthomsen/openwrt-luci,lbthomsen/openwrt-luci,rogerpueyo/luci,remakeelectric/luci,bittorf/luci,nmav/luci